Yankton County's SSURGO septic rating

Very limited

Yankton County, SD's SSURGO dominant class comes back "Very limited", covering 90.7% of the county. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 90.7% of the county. For scale: 521.189 square miles and 23,509 people call Yankton County home.

Before you rely on this for one lot

USDA's survey covers the whole of Yankton County, SD at once, not any single address. The real answer for one lot is still a site-specific perc test, running about $750-$1,850 (typically near $1,300).

Budgeting for a system in Yankton County, SD

Yankton County's soil reading pushes the likely outcome toward an engineered system rather than a conventional one. Conventional systems run $3,000-$8,000 where they pass; where they don't, engineered alternatives (mound or aerobic treatment, whichever the health department requires) run $10,000-$40,000 - budget toward the higher figure until a perc test says otherwise.

Yankton County's rank among South Dakota counties

Among the 3,058 rated counties on this site, Yankton County, SD ranks 1,199 most-constrained nationally, and 22 of 66 within South Dakota.

Related guides

How this rating is built, and its real limits · Conventional vs. engineered septic systems